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首页> 外文期刊>Revista de metalurgia >Coke, char and organic waste behaviour in the blast furnace with high injection rate
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Coke, char and organic waste behaviour in the blast furnace with high injection rate

机译：高喷射速率下高炉中的焦炭，焦炭和有机废物行为

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Blast furnace operation with low coke rate, high amount of auxiliary hydrocarbons and use of nut coke causes a change in coke quality requirements. In particular, not burned in the raceway residues of injected substances (char and ash) can influence the coke behaviour. Therefore combustion efficiency of various organic wastes with and without pulverized coal injection (PCI) and coal char has been investigated under the raceway simulation conditions. Mixing of various substances improves their combustion efficiency. Study on coke gasification by carbon dioxide in the presence of char showed that with the increase of char concentration, coke strength reduction becomes smaller. The reactivity of char with CO_2 is higher than that of coke. Therefore char is consumed preferentially. In presence of injected char, total pore volume in coke and its wear resistance were increased. Coke reactivity and microstructure in the presence of various kinds of ash has been studied. Many ash spheres were observed on the surface of coke matrix and its size was dependent on ash properties.
机译：高炼焦率低，辅助烃含量高的高炉操作以及使用坚果焦炭会改变焦炭质量要求。特别是，未在滚道中燃烧的已注入物质（炭和灰分）残留会影响焦炭性能。因此，在跑道模拟条件下，研究了有或没有粉煤喷射（PCI）和煤焦的各种有机废物的燃烧效率。各种物质的混合提高了燃烧效率。在焦炭存在下用二氧化碳对焦炭进行气化的研究表明，随着焦炭浓度的增加，焦炭强度的降低变小。焦炭与CO_2的反应性高于焦炭。因此，char优先消耗。在注入焦炭的情况下，焦炭中的总孔体积及其耐磨性增加。研究了各种灰分存在下的焦炭反应性和微观结构。在焦炭基质的表面上观察到许多灰球，其大小取决于灰性质。

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